There are a few alternative timelines. Some scholars extend the end date of the golden age to around 1350, including the Timurid Renaissance within it,[6][7] while others place the end of the Islamic Golden Age as late as the end of 15th to 16th centuries, including the rise of the Islamic gunpowder empires.
The Ottomans managed to siege Vienna centuries after the end of the Golden Age. They were not that behind in technology. Really the big change happened with the industrial revolution, which the islamic world mostly failed to implement. However at least the Ottomans managed to do a good enough job, to stand the ground against the Brits. Of the none Western world only Japan and depending on how you look at it Russia was better at adopting Western science and technology.
Probably more important is the next paragraph:
The Ottomans managed to siege Vienna centuries after the end of the Golden Age. They were not that behind in technology. Really the big change happened with the industrial revolution, which the islamic world mostly failed to implement. However at least the Ottomans managed to do a good enough job, to stand the ground against the Brits. Of the none Western world only Japan and depending on how you look at it Russia was better at adopting Western science and technology.
Iran and Moghul India did much worse though.